Navien NaviCirc Series Installation And Operation Manual page 23

Warranty Service
At its option, Navien will replace the defective component
(part), in accordance with the terms of this Limited Warranty, if
it fails in normal use and service during the applicable warranty
period identified above. The replacement component must be
Navien original factory component. Navien, at its sole discretion,
may replace the product with a new or refurbished product of
comparable quality and design. The replacement component or
product will be warranted only for the unexpired portion of the
original component's applicable warranty period. Payment for
labor in completing the warranty service is subject to Navien's
prior written approval and shall be subject to Navien's schedule of
approved labor allowances.
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